Muchas personas que usan este medicamento no tienen efectos secundarios graves. Read more on male sexual health on the Sexual Health Australia site. What alternatives can I use for erectile dysfunction? The medication will be effective for up to 36 hours. You could get dizzy, faint or have a heart attack or stroke. What should I talk to my doctor about when considering if Cialis is right for me? Can Cialis be used with other treatments for impotence?Roman is a telehealth prescription service and online pharmacy that provides prescription Cialis for ED and a host of other conditions, like hair loss, cold sores, and premature ejaculation. When. Cialis lasts up to 36 hours in the body, while Viagra lasts 4–6 hours in the body. Both are taken 30 minutes before sex. Cialis can cause limb pain, while Viagra can cause vision change, rash. CIALIS for once daily use is a lower dose you take every day. • Do not take CIALIS more than one time each day. • Take one CIALIS tablet every day at about the same time of day. You may attempt sexual activity at any time between doses. • If you miss a dose, you may take it when you remember but do not take more than one dose per day.